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Programmable Downconverter

The HSP50214B Programmable Downconverter converts digitized IF data into filtered baseband data which can be processed by a standard DSP microprocessor. The Programmable Downconverter (PDC) performs down conversion, decimation, narrowband low pass filtering, gain scaling, resampling, and Cartesian to Polar coordinate conversion.

Features

? Up to 65MSPS Front-End Processing Rates (CLKIN) and 55MHz Back-End Processing Rates (PROCCLK) Clocks May Be Asynchronous

? Processing Capable of >100dB SFDR

? Up to 255-Tap Programmable FIR

? Overall Decimation Factor Ranging from 4 to 16384

? Output Samples Rates to ? 12.94MSPS with Output Bandwidths to ? 982kHz Lowpass

? 32-Bit Programmable NCO for Channel Selection and Carrier Tracking

? Digital Resampling Filter for Symbol Tracking Loops and Incommensurate Sample-to-Output Clock Ratios

? Digital AGC with Programmable Limits and Slew Rate to Optimize Output Signal Resolution; Fixed or Auto Gain Adjust

? Serial, Parallel, and FIFO 16-Bit Output Modes

? Cartesian to Polar Converter and Frequency Discriminator for AFC Loops and Demodulation of AM, FM, FSK, and DPSK

? Input Level Detector for External I.F. AGC Support

? Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

? Single Channel Digital Software Radio Receivers

? Base Station Rx’s: AMPS, NA TDMA, GSM, and CDMA

? Compatible with HSP50210 Digital Costas Loop for PSK Reception

? Evaluation Platform Available